Yamaha YPJ-K: Cruise at 50km/h (31mph)

[Timpo]

I believe it's a prototype, Yamaha claims this bike can cruise at 50km/h (31mph)

自転車競技用先導車「YPJ-K」の開発に着手 電動アシストロードバイク「YPJ-R」をベースに専用開発 - 広報発表資料 | ヤマハ発動機

global.yamaha-motor.com

 

[Ebiker01]

Rim brAkes with a powerful motor.... How dumb is that ?

 

[Slow Rider]

Prototype from 2016, looks like it was designed to be used as a pacer for velodrome races.